A fast, mobile-first Point of Sale (POS) system with barcode scanning — built using Next.js + Firebase.

Scan products → auto add to cart → generate bill → download receipt. All from your phone. No expensive machines needed.

Scan → Add → Bill → Done ⚡ (Add a GIF or short video here showing full flow)

• 📷 Barcode Scanner (real-time)
• 🛒 Smart Cart (auto quantity update)
• 🧾 Billing System (instant total)
• 📄 PDF Receipt Generator
• 🔐 Admin Dashboard (add/edit/delete products)
• 🔥 Firebase Backend (real-time + scalable)
• 📱 Mobile-first design (shop-friendly)

• 🏪 Kirana Stores
• 🏋️ Gyms (supplements billing)
• 💊 Medical Shops
• 🛍️ Small Retail Businesses

• Frontend: Next.js + Tailwind CSS
• Backend: Firebase (Firestore + Auth)
• Scanner: html5-qrcode
• PDF: jsPDF

git clone https://github.com/raizianofficial/firebase-pos-scanner.git
cd YOUR_REPO_NAME
npm install
npm run dev

1. Go to Firebase Console
2. Create a new project
3. Enable Firestore Database
4. Enable Authentication (Email/Password)

Create a .env.local file:

NEXT_PUBLIC_FIREBASE_API_KEY=your_key
NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=your_domain
NEXT_PUBLIC_FIREBASE_PROJECT_ID=your_project_id
NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=your_bucket
NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=your_sender_id
NEXT_PUBLIC_FIREBASE_APP_ID=your_app_id

• barcode (string)
• name (string)
• price (number)

• totalAmount
• createdAt

• name
• price
• quantity

1. Scan barcode 📷
2. Fetch product from Firebase
3. Add to cart 🛒
4. Click "Generate Bill"
5. Receipt generated 🧾

• Multi-shop support
• Analytics dashboard
• WhatsApp receipt sharing
• Offline mode
• Thermal printer integration

Contributions are welcome!

• Fork the repo
• Create a new branch
• Submit a pull request

If you find this project useful:

👉 Star this repo 👉 Follow me for more projects

Built by Sunny Rawat (Raizian) 🚀 Building real-world tools & systems

Tags: firebase pos-system barcode-scanner nextjs tailwindcss firestore web-app open-source javascript react billing-system

MIT License — free to use and modify.